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Merge pull request #3761 from 86Box/tc1995

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VGA/XGA memory fix.
This commit is contained in:
Miran Grča
2023-10-15 19:34:35 +02:00
committed by GitHub
parent 3d082d5ebe 85bdf40a1c
commit f63016b20f
1 changed files with 3 additions and 1 deletions
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4
src/video/vid_svga.c
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@@ -1259,6 +1259,8 @@ svga_write_common(uint32_t addr, uint8_t val, uint8_t linear, void *priv)
xga->test = val; xga->test = val;
if (addr == 0xa0001) if (addr == 0xa0001)
xga->a5_test = 1; xga->a5_test = 1;
else if (addr == 0xafffe)
xga->a5_test = 2;
xga->on = 0; xga->on = 0;
vga_on = 1; vga_on = 1;
@@ -1479,7 +1481,7 @@ svga_read_common(uint32_t addr, uint8_t linear, void *priv)
ret = xga->test; ret = xga->test;
xga->on = 1; xga->on = 1;
vga_on = 0; vga_on = 0;
} else if ((addr == 0xa0000) && xga->a5_test) { /*This is required by XGAKIT to pass the memory test*/ } else if ((addr == 0xa0000) && (xga->a5_test == 1)) { /*This is required by XGAKIT to pass the memory test*/
svga_log("A5 test bank = %x.\n", addr); svga_log("A5 test bank = %x.\n", addr);
addr += xga->read_bank; addr += xga->read_bank;
ret = xga->vram[addr & xga->vram_mask]; ret = xga->vram[addr & xga->vram_mask];